it might not be such a bad deal. basically unlike cloud hash where you purchase ghs directly, they are offering to plug in YOUR s4 that you purchase (used i assume) and direct it to the pool with your username.

they cant guarantee hash rate, because each s4 is slightly different. altho it looks like if your used s4 fails in their possession, they will replace it.

it also looks like when the fee is higher then the payout, they offer to mail it to you. which unfortunately probably wont take very long.